Most cars have a water pump, a power-steering pump and various accessories that are driven by belts. On older cars, each part gets its own belt. On most modern cars, they’re all driven by one belt, called a serpentine belt.

Like tires and fluids, belts wear out from use, age and heat. When they fail, whatever they were powering fails with them. Since the serpentine belt powers so many parts, that’s a lot of the car. Without the water pump, the engine will rapidly overheat. The alternator quits producing amps, the power steering is without power. Very suddenly, you’re not going anywhere.

Belts hardly ever fail while you’re at the service station. They much prefer dark roads, far from help. To avoid this, have your belts inspected regularly—especially if they’re 4-5 years old or have 50,000 miles on them. Replace the serpentine belt if it is worn.

Have a concern about your belts? Let the pros at Big O Tires take a look at them for you. While you’re here, we’ll also make sure your tires have the right pressure.

What does the timing belt do?

The timing belt is the belt that controls the camshafts in your engine, opening and closing valves at just the right time for smooth operation. The timing belt has teeth that turn the camshaft in time with the crankshaft.

Some cars and trucks use timing chains or gears, which are more durable. But timing belts, made of rubber compound, are quieter and more efficient. They also don’t need lube to work.

On some engines, if the timing belt fails, valves will be held open when they should not be and will be struck by the pistons, causing major damage to your engine. So you want to prevent it at all costs.

While you’re getting the timing belt changed, it’s a good idea to get a new water pump, too. Water pumps have similar life spans, and they’re easy to get to while the timing belt is off. If you wait, you’ll have to pay more for installation later.

When is it time to change a timing belt? Most timing belts are rated for between 60,000 miles and 90,000 miles. The belt can’t be checked easily so you replace your timing belt on a schedule. Check your manual. If it’s time, bring your car or truck to Big O Tires.